1128639274 has 8 divisors (see below), whose sum is σ = 1934810208. Its totient is φ = 483702540.

The previous prime is 1128639257. The next prime is 1128639283. The reversal of 1128639274 is 4729368211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1128639274² = 2547653221630494152, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1128639274.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40308532 + ... + 40308559.

It is an arithmetic number, because the mean of its divisors is an integer number (241851276).

Almost surely, 2^1128639274 is an apocalyptic number.

1128639274 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1128639274 is a deficient number, since it is larger than the sum of its proper divisors (806170934).

1128639274 is an equidigital number, since it uses as much as digits as its factorization.

1128639274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80617100.

The product of its digits is 145152, while the sum is 43.

The square root of 1128639274 is about 33595.2269526491. The cubic root of 1128639274 is about 1041.1621851351.

The spelling of 1128639274 in words is "one billion, one hundred twenty-eight million, six hundred thirty-nine thousand, two hundred seventy-four".